Improvement in apparatus for straightening and polishing cylindrical bars or tubes



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THE GRAPHIC C0.PH9T0.LITH.39&4I PARK PLAGEJLY.

UNITED STATES PATENT (DEEICE. v

GEORGE WALTER DYSON, OF TINSLEY, ENGLAND.

IMPROVEMENT IN APPARATUS FOR STRAlGHTENlNG AND POLISHING CYLINDRICALBARS'OR TUBES.

T0 all whom t may concern.-

Be it known that I, GEORGE WALTER DY- useful Improvement in Machineryfor Rolling,

' Finishing, and Polishing Cylindrical Metallic Rods, Bars or Shafts,Tubes or Pipes; and I do hereby declare that the following isa full,clear, and exact description thereof, reference being had to the annexeddrawings, forming part o this specication, in which- Figure 1 is a frontelevation of my improved machinery. Fig. 2 is a plan or top view. Fig. 3is a transverse vertical section through the machine at w x, Fig. 1,showing the inside view of the housing for the rolls, and the rolls,guiderollers, and the bar which is being rolled in section. Fig. 4 is anelevation or end view of my machine at the end where the rolls aresituate, showing the housing for the rolls. Fig. 5 is an elevation ofthe opposite end of my machine, showing the housing for the cog-wheelsor gearing for driving the machinery.v

In the several figures like letters of re ference denote similar parts.

My improved-machinery consists of a pair of rolls set with their axesnot parallel, out slightly inclined in opposite directions to eachother, although situate in parallel planes, both rolls being driven inthe same direction. The rod, bar, or shaft to be rolled and polished,

` being first rounded, is introduced between guides or guide-rollers,not as is usual, at right angles to the axes of the rolls, but in a linenearly parallel thereto, and by virtue of the opposite inclination ofthe axes of the rolls it is drawn between them in a line nearly parallelto the axes of the rolls,while it is caused to rotate, and is therebyrendered cylindrical, smooth, and polished.

My machinery is also adapted to the rolling of tubes or pipes by theaddition of a mandrel between the rolls, over which the pipe or tube isdrawn.

To enable others skilled in the art to construct and use my-improvedmachinery for rolling and'polishing cylindrical metallic bars or tubes,I will proceed to describe its construction and operation.

In the drawings, a a are the housings of the rolls,which are made in theusual or any convenient manner. In these housings are placed bearings orblocksb b,which carry the brasses in which the journals of the rollsrevolve.

c care the rolls, placed horizontally one above the other in thehousing, their axes being situate in parallel horizontal planes, as seenin Fig. 1 5 butthe vertical planes passing through their axes are notparallel, but inclined inopposite directions to the central line of themachine, as shown in Fig. 2. Spiral springs s s are placed in thehousings a c" of the rolls, to hold up the upper roll c; and d d arepressurescrews in the top of the housing, to press down the bearing ofthe upper roll.

On the outer face of both ofthe housings a c is placed a horizontalstrap, e, midwaybetween the axes of the two rolls c c', which strapsupports the journals p p of the two guide-rollers g g, whichguide-rollers are placed horizontally between the housings a a, and aredesigned to guide the shaft or bar of iron in its passage between therolls c c. The axes of the guide-rollers are parallel to each other andto the central line of the machine. The straps e have a circular openingat h for the passage of the bar of iron which is being operated upon bythe rolls.

At the opposite end of the machine is placed the gearing by which therolls are driven, which is so arranged as to cause the rolls c c torevolve on their axes in the same direction. The gearing is supported byhousings k k in the usual manner. It will be seen that the axes of thecog-wheels j j are not in the same ver-tical line. To thegearing-housings k lo is attached a support, with projecting sides ZZ,which extends through the machine to the inner roll-housing, c', towhich also it is attached. vThis support serves to sustain and guide therod, bar, or shaft to be rolled in a straight coursevas it passes fromthe rolls c c. As the axes of the rolls c c are set in the same verticalline, and are divergent from the same line of the machine, they areconnected to the j ournals of the cog-wheelsj j', by which they aredriven by the coupling-spindles mm, each ofthe extremities of whichenter one of the couplingboxes n n, intoA which also the journals of thecog-wheels jj are inserted, as seen in Figs. 1 and 2.

In the several gures, p represents a bar or shaft passing through themachine.

The operation of my machine is as follows:

A bar or shaft of iron, previously prepared by being made more or lessround in any ordinary manner, is introduced while still hot through thecircular hole h in the outer strap, e, and between the inclined rolls cc. The rotation of these inclined rolls in the same direction draws theshaft or bar into the machine and causes it to revolve on its axis atthe same time between the periphery' c c, whereby it is renderedcylindrical, smooth, and polished. The bar or shaft, thus rolled andpolished, passes gradually from between the rolls, between the guides ZZ, and is thus delivered from the machine.

Although I prefer to use guide-rollers g g, revolving freely on theiraxes, yet thisis not necessary, as guides in the form of flat bars orsquare blocks may be substituted in their place. or both may be employedin the same machine.

, When applied to the manufacture of pipes or tubes, the machineryremains as before de scribed; but in addition to the guides I use amandrel between the rolls, over which the tube or pipe is drawn.

Having thus described my improvement,

what I claim as my invention, and desire to sc cure by Letters Patent,is-

1. Rolling and polishing pieces of solid metal or tubing of cylindricalshape by passing them between rolls in a direction in a line bisectingthe angle of inclination of the axes of the rolls to each other-that is,in a direction nearly parallel with the axes of the rolls-instead of aparallel direction or one at right angles thereto.

2. The use of rolls the axes of which are inclined to each other, andwhich are made to rotate in the same direction, through and betweenwhich metal rods, bars, and shafts or tubing are made to pass by therotation of the rolls, aided by guides, for the purpose of giving acylindrical shape to such bars, shafts, or tubing, and at the same time,if desired, polishing the same.

In testimony whereof I have hereunto set my hand this 14th day ofOctober, A. D. 1863.

GEORGE WALTER DYSON.

In presence of- LEWIS Poonn, JOHN T. ATKINSON.

